﻿#region BSD 3-Clause License
/* Copyright (c) 2012, Intel Corporation
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *    
 * 3. Neither the name of Intel Corporation nor the names of its contributors may
 *    be used to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#endregion

using System;
using SpartanUnit;
using OpenHopla.Timing;

namespace OpenHopla.UnitTests.Root.Timing
{
    class StopwatchShould : TestSuite
    {
        private Stopwatch NewStopwatch = null;

        public override void Setup()
        {
            base.Setup();
            NewStopwatch = new Stopwatch();
        }

        [TestCase]
        public void Exist()
        {
            Assert.IsTrue(NewStopwatch != null);
        }

        [TestCase]
        public void DisplayZeroWhenNew()
        {
            Assert.IsTrue(NewStopwatch.AccumulatedTime == TimeSpan.Zero);
        }

        [TestCase]
        public void BeStoppedWhenNew()
        {
            Assert.IsTrue(NewStopwatch.IsStopped);
            Assert.IsTrue(!NewStopwatch.IsRunning);
        }

        [TestCase]
        public void Start()
        {
            Assert.IsTrue(NewStopwatch.IsStopped);
            NewStopwatch.StartStop();
            Assert.IsTrue(NewStopwatch.IsRunning);
        }

        [TestCase]
        public void Stop()
        {
            NewStopwatch.StartStop();
            Assert.IsTrue(NewStopwatch.IsRunning);
            NewStopwatch.StartStop();
            Assert.IsTrue(NewStopwatch.IsStopped);
        }

        [TestCase]
        public void DisplayCorrectTime()
        {
            double delta = 0.05;

            for (double seconds = 0.1; seconds < 1; seconds += 0.2)
            {
                DateTime startTime = DateTime.Now;
                NewStopwatch.StartStop();
                while (DateTime.Now - startTime < TimeSpan.FromSeconds(seconds)) ;
                NewStopwatch.StartStop();
                Assert.IsTrue(TimeSpan.FromSeconds(seconds - delta) < NewStopwatch.AccumulatedTime);
                Assert.IsTrue(TimeSpan.FromSeconds(seconds + delta) > NewStopwatch.AccumulatedTime);
                NewStopwatch.LapReset();
            }
        }
    }
}
